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<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <title>Boxue</title>
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  <body>
    <div class="box">
      <div class="siginin">better to better</div>
    </div>

    <script src="./js/jquery.min.js"></script>
    <script src="./js/popup.js"></script>
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</html>
